package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.dto.DishDTO;
import com.sky.dto.DishPageQueryDTO;
import com.sky.entity.Dish;
import com.sky.entity.DishFlavor;
import com.sky.entity.Setmeal;
import com.sky.exception.DeletionNotAllowedException;
import com.sky.mapper.DishFlavorMapper;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetmealDishMapper;
import com.sky.mapper.SetmealMapper;
import com.sky.result.PageResult;
import com.sky.service.DishService;
import com.sky.vo.DishVO;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.ArrayList;
import java.util.List;

@Service
@Slf4j
public class DishServiceImpl implements DishService {

    @Autowired
    private SetmealDishMapper setmealDishMapper;
    @Autowired
    private DishMapper dishMapper;

    @Autowired
    private DishFlavorMapper dishFlavorMapper;

    @Autowired
    private SetmealMapper setmealMapper;
    /*
    * 新增菜品和口味
    * */
    @Transactional
    public void saveWithFlavor(DishDTO dishDTO) {

        Dish dish = new Dish();
        BeanUtils.copyProperties(dishDTO,dish);
        //向菜品表插入一条数据
        dishMapper.insert(dish);
        //获取insert语句生成的主键值

        Long dishId = dish.getId();


        List<DishFlavor> flavors = dishDTO.getFlavors();
        if(flavors != null && flavors.size()>0)
        {
            flavors.forEach(dishFlavor ->{
                dishFlavor.setDishId(dishId);
            } );
            //向口味里插入数据
            dishFlavorMapper.insetBatch(flavors);
        }
    }

    /*
    *
    * 菜品分页查询
    * */
    @Override
    public PageResult pageQuery(DishPageQueryDTO dishPageQueryDTO) {

        PageHelper.startPage(dishPageQueryDTO.getPage(),dishPageQueryDTO.getPageSize());

        Page<DishVO> page=dishMapper.PageQuery(dishPageQueryDTO);

        return new PageResult(page.getTotal(),page.getResult());
    }

    /*
    * 菜品批量删除
    * */

    @Transactional
    public void deleteBatch(List<Long> ids) {
        //判断当前菜品是否存在能够删除--是否存在起售中的菜品
        for (Long id : ids) {
           Dish dish = dishMapper.getById(id);
           if (dish.getStatus()== StatusConstant.ENABLE)
           {
               throw  new DeletionNotAllowedException(MessageConstant.DISH_ON_SALE);
           }
        }
        //判断当前菜品是否能够删除---是否被套餐关联了？？
        List<Long> setmealIds = setmealDishMapper.getSetmealIdsByDishIds(ids);
        if (setmealIds !=null && setmealIds.size()>0){

            //当前菜品被套餐关联了，不能删除
            throw new DeletionNotAllowedException(MessageConstant.DISH_BE_RELATED_BY_SETMEAL);
        }

        //删除菜菜品中的菜品数据
       for (Long id : ids) {
            dishMapper.deleteById(id);
            //删除菜品关联的口味数据
            dishFlavorMapper.deleteByDishId(id);

        }
        //根据菜品id集合批量删除菜品数据
        //sql; delete from dish where id in (?,?,?)
        //dishMapper.deleteByIds(ids);

        //根据菜品id集合批量删除关联的口味数据
        //sql: delete from dish_flavor where dish_id (?,?,?)
       // dishFlavorMapper.deleteByDishIds(ids);

    }
    /*
    * 根据id查询菜品和对应的口味数据
    * */
    @Override
    public DishVO getByIdWithFlavor(Long id) {
       //根据id查询菜品数据
        Dish dish = dishMapper.getById(id);
        //根据菜品id查询口味数据
       List<DishFlavor> dishFlavors= dishFlavorMapper.getByDishId(id);
        //将查询到的数据封装到DishVo
        DishVO dishVO = new DishVO();
        BeanUtils.copyProperties(dish,dishVO);
       dishVO.setFlavors(dishFlavors);
        return dishVO;
    }

    /*
     * 根据id修改具体的菜品和对应的口味信息
     * */
    @Override
    public void updateWithFlavor(DishDTO dishDTO) {

        Dish dish = new Dish();
        BeanUtils.copyProperties(dishDTO,dish);
        //修改菜品表的基本信息
        dishMapper.update(dish);
        //删除原有的口味数据
        dishFlavorMapper.deleteByDishId(dishDTO.getId());
        //重新插入口味数据
        List<DishFlavor> flavors = dishDTO.getFlavors();

        if(flavors != null && flavors.size()>0)
        {
            flavors.forEach(dishFlavor ->{
                dishFlavor.setDishId(dishDTO.getId());
            } );
            //向口味里插入数据
            dishFlavorMapper.insetBatch(flavors);
        }
    }
    /*
    * 菜品起售或停售
    * */

    @Transactional
    public void startOrStop(Integer status, Long id) {
      Dish dish  = Dish.builder()
                .id(id)
                .status(status)
              .build();
      dishMapper.update(dish);

      //如果是停售状态，还需要将包含当前菜品的套餐也停售
        if (status == StatusConstant.DISABLE)
        {
            List<Long> dishIds= new ArrayList<>();
            dishIds.add(id);
            List<Long> setmealIds = setmealDishMapper.getSetmealIdsByDishIds(dishIds);
            if (setmealIds != null && setmealIds.size()>0)
            {
                for (Long setmealId : setmealIds) {
                     Setmeal setmeal =  Setmeal.builder()
                            .id(setmealId)
                            .status(StatusConstant.DISABLE)
                            .build();
                     setmealMapper.update(setmeal);

                }
            }
        }
    }
    /*
     * 根据分类id查询菜品
     * */

    public List<Dish> list(Long categoryId) {
        Dish dish = Dish.builder()
                .categoryId(categoryId)
                .status(StatusConstant.ENABLE)
                .build();
        return dishMapper.list(dish);

    }
    /**
     * 条件查询菜品和口味
     * @param dish
     * @return
     */
    public List<DishVO> listWithFlavor(Dish dish) {
        List<Dish> dishList = dishMapper.list(dish);

        List<DishVO> dishVOList = new ArrayList<>();

        for (Dish d : dishList) {
            DishVO dishVO = new DishVO();
            BeanUtils.copyProperties(d,dishVO);

            //根据菜品id查询对应的口味
            List<DishFlavor> flavors = dishFlavorMapper.getByDishId(d.getId());

            dishVO.setFlavors(flavors);
            dishVOList.add(dishVO);
        }

        return dishVOList;
    }
}

